Propose an efficient synthesis for the following transformation: The transformations above can be performed with some combination of the reagents listed below. Give the necessary reagents in the correct order for each transformation, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. A. H2,Pt B. Na2Cr2O7,H2SO4,H2O C. 1) BH3THF;2)H2O2,NaOH D. NaOH E. TsCl, pyridine F. conc. H2SO4, heat G. PCC or DMP H. t-BuOK I. 1) LiAlH4;2)H3O+